工厂方法FactoryMethod 初步学习笔记

class 
{
public:
    virtual ~Creator();

    virtual Result* () 
    {
        Result* p_result = new Result;
        p_result->SetProductA(MakeProductA());
        p_result->SetProductB(MakeProductB());
        return p_result;
    }
    virtual AbstractProductA* MakeProductA() = 0;
    virtual AbstractProductB* MakeProductB() = 0;
};

class ConcreteCreator1 : public Creator
{
public:

    AbstractProductA* MakeProductA() override
    {
        return new ConcreteProductA1;
    }
    AbstractProductB* MakeProductB() override
    {
        return new ConcreteProductB1;
    }
};

class ConcreteCreator2 : public Creator
{
public:

    AbstractProductA* MakeProductA() override
大专栏  工厂方法FactoryMethod 初步学习笔记="function">    {
        return new ConcreteProductA2;
    }
    AbstractProductB* MakeProductB() override
    {
        return new ConcreteProductB2;
    }
};

Creator* p_creator1 = new ConcreteCreator1;
Result* p_result1 = p_creator1->CreateResult();

Creator* p_creator2 = new ConcreteCreator2;
Result* p_result2 = p_creator2->CreateResult();

template <typename T_ProductA, typename T_ProductB>
class TemplateCreator : public Creator
{
public:

    AbstractProductA* MakeProductA() override
    {
        return new T_ProductA;
    }
    AbstractProductB* MakeProductB() override
    {
        return new T_ProductB;
    }
};


Creator* p_creator3 = new TemplateCreator<ConcreteProductA3, ConcreteProductB3>;
Result* p_result3 = p_creator3->CreateResult();

Creator* p_creator4 = new TemplateCreator<ConcreteProductA4, ConcreteProductB4>;
Result* p_result4 = p_creator4->CreateResult();

AbstractProductC* ConcreteCreator::MakeProductC(Type label) override
{
    if (label == 5) return ConcreteProductC5;
    if (label == 6) return ConcreteProductC6;
    return Creator::MakeProductC(label);
}